JPS6224464A - Cassette loading device - Google Patents

Abstract

PURPOSE:To eliminate synchronous gears to reduce the cost by connecting positions, around which turning arm members in both of right and left sides for driving a cassette holder are rotated, into one body by a synchronous shaft body to synchronize rotation. CONSTITUTION:Turning arms 13 and 14 are connected by a synchronous shaft body 6, and the synchronous shaft body 6 is arranged in the space between a cassette 1 in the cassette correct loading position and a chassis 16. When a right driving gear 8 receives power of a motor 11 and is rotated clockwise, the right turning arm 13 provided on the driving gear 8 as one body is rotated clockwise, and the left turning arm 14 is rotated counterclockwise through the synchronous shaft body 6. The rotating force is transmitted to guide pins 12b, 12'b of a cassette holder 12, and pins 12b and 12'b are slided along long slots 2b and 3b to move the cassette holder 12 right horizontally. The cassette holder is moved down vertically to transport a cassette 1 from the cassette eject position to the correct loading position.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a video recorder (hereinafter referred to as VTR).
The present invention relates to a cassette loading device in a magnetic recording/reproducing device such as the above, and particularly to a mechanism suitable for a cassette loading device of the cassette front insertion type.

[Background of the invention]

In a cassette-type front-operated VTR, a tape cassette (hereinafter referred to as a cassette) is inserted into a cassette holder, and the cassette holder is moved horizontally and then vertically to move the cassette from the ejection position to the normal loading position. It is made to move forward to load a predetermined cassette. In order to transfer the cassette holder, power from the loading motor is transmitted to the cassette holder via a gear train, but since VTR cassettes are relatively large, it is necessary to transfer the cassette holder smoothly. In order to achieve this, it is necessary to arrange a rotating arm member for driving the cassette holder and a drive gear for driving the rotating arm member on both sides of the cassette holder, and to synchronize the rotations of these drive gears on both sides. tsu'''1
If the rotations of the driving gears and rotating arm members on both sides of the cassette holder do not match, the cassette holder will be twisted and the transfer will not be carried out properly.

For this purpose, conventionally, small gears (hereinafter referred to as synchronous gears) that mesh with the drive gears on both sides were provided, and the synchronous gears were integrally fastened together by a single rod-shaped synchronous shaft.

However, such a conventional configuration has the following problems. That is, (1) it is necessary to provide one synchronous gear on each side that meshes with the left and right drive gears on both sides for driving the cassette holder, leading to an increase in cost.

(2) Due to backlash, which is essential for gear transmission between the left and right drive gears and the synchronization gear, it is difficult to completely ensure rotational synchronization on both sides of the cassette holder, which also becomes a factor that prevents smooth transfer of the cassette holder. was.

(3) Moreover, a space is required to separately install the synchronizing gear, which is disadvantageous for downsizing the device.

An example of a patent related to this type of device is JP-A-58-164049.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a low-cost and simple cassette loading device.

[Summary of the invention]

The present invention has discovered that the center of rotation of the rotating arm member that can ensure the rotational synchronization of the rotating arm members on both sides is located in a narrow space between the cassette and the chassis when the cassette is properly installed. The center of rotation of the arm member was set. Further, the rotation center positions of the rotating arm members on both sides were integrally connected by a rod-shaped synchronizing shaft body to achieve rotational synchronization.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view schematically showing a cassette loading device according to an embodiment of the present invention, FIGS. 2 to 4 are sectional views of essential parts thereof, and FIG. 2 is a cassette ejection state seen from the right side. FIG. 3 is a view of the cassette properly installed as seen from the right side, and FIG. 4 is a view of the cassette properly installed as seen from the left side.

As shown in FIG. 1, the cassette loading device has a right side plate 2 and a left side plate 5 on both sides, which are connected and fixed by a top plate 15 and a support frame 4. Then, insert the -4 (cassette insertion slot side) of the right side plate 2 and the left side plate 3 into the notch 16α of the chassis 16, fix the other end (the side opposite to the cassette insertion slot) with the screw 17, and then attach them to the chassis 16. Fixedly installed. Note that a positioning pin 18 and a support pin 19 are vertically provided on the chassis 16 so as to face each other in the mounting direction of the cassette 1, and regulate the posture of the cassette 1 in the correct mounting position.

The right side plate 2 is provided with L-shaped slotted holes 12L and 2α, and the left side plate 3 is provided with L-shaped slotted holes 5α and 3α. Also, is the loading motor 1 installed on the right side plate 2? (Fig. 1.

(See FIG. 2) A worm gear IO is integrally connected to the motor shaft. Furthermore, an intermediate gear 9 is provided which meshes with the worm gear 10, and a right drive gear 8 meshes with a small diameter gear 9α provided on the intermediate gear 9.

Further, on the side of the right side plate 2, as shown in FIGS. 2 and 3, a right rotation arm 13 is provided which rotates integrally with the right drive gear 8. As shown, an elongated hole 13α is formed near the tip of the rotating arm 13, and guide bins 12cL and 12b of the cassette holder 12 are inserted into the elongated hole 13α.

Similarly, on the side of the left side plate 3, there is a left rotating arm 1 as shown in Fig. 4.
4 are provided. A long hole 1 is provided at the end of the rotating arm 14.
4α is formed, and the cassette holder 12 is formed on the long side.
The guide pins xia and x2'b are inserted. The rotating arms 13 and 14 are connected by a synchronizing shaft 6. As shown in FIGS. 3 and 4, the synchronizing shaft body 6 is disposed in a space between the cassette 1 and the chassis 16 in the cassette normal mounting position, and is supported by a shaft. The cassette holder 12 has guide pins 12α, 12b, 1 on both side walls 12C, 12d.
12'lS is planted υ, said right side plate 2
The cassette holder 12 is inserted into the long slot holes 2α, 2 and into the long slot holes 6α, 3b of the left side plate 3, respectively.
a and 3b allow movement from the cassette ejection position to the cassette normal mounting position.

Here, the right rotation arm 13. Right drive gear 8 and left rotation arm I4
The center of rotation of is aligned with the center of the synchronizing shaft B placed in the space between the cassette 1 and the chassis 16 (FIGS. 3 and 4). The left rotating arm 14 is integrally connected. Further, the rotational center position of the synchronizing shaft body 6 is set to a position that satisfies the following matters.

That is, in FIGS. 3 and 4, the elongated hole X3 of the right rotation arm 13
C, rotation locus R1 on both ends of the long hole 14α of the left rotating arm 14
and the long holes 13α and 14α in the range of R2 (W part).
The guide bins 12 of the cassette holders 12 each inserted into the
The transport trajectories of α, 12 b , 12'α, 12'b are included. With this configuration, it is possible to directly transmit the rotation of the right drive gear 8 to the left rotating arm 14 without using a synchronizing gear as in the prior art described above.

Next, the operation of the cassette loading device will be explained. The power of the loading motor 1 is a worm gear io.

Intermediate gear9. It is transmitted to the right drive gear 8 via the small diameter gear 9α. When the right drive gear 8 rotates clockwise under the power of the motor 1, the right rotation arm 13 integrally provided with the drive gear rotates clockwise in FIG. At this time, the rotation of the right drive gear 8 is transmitted to the left rotating arm 14 via the synchronizing shaft 6, and the left rotating arm rotates counterclockwise in FIG. 4. When these right and left rotating arms 13, 14 rotate, the rotational force is transmitted to the guide bins 12A, 12'iS of the cassette holder 12, and the guide bins 12b, 12'b are connected to the long slot holes 2b, 5b. 2 and 3, the cassette holder 12 first moves horizontally to the right and then vertically moves downward. At this time, the guide bins 12α, 12′α also have long slot holes 2α,
Slide along 3b.

By moving the cassette holder 2 as described above, the cassette 1 can be transferred from the cassette ejection position shown in FIG. 2 to the normal mounting position shown in FIGS. 3 and 4. In addition, by pressing the eject command button (not shown), the loading Tanabata 1) is reversed, and the operation is performed in the opposite direction (backward movement) to the normal loading position shown in Figures 3 and 4. From there, the cassette 1 can be transferred to the ejection position shown in FIG.

〔Effect of the invention〕

According to the present invention as described above, it is possible to eliminate the synchronizing gear in the conventional VTR cassette loading device and to produce the first effect.

(1) Eliminating synchronous gears can contribute to cost reduction.

(2) Furthermore, the transfer reliability of the deer set holder is improved since rotational synchronization of both rotating arms can be ensured without the need for balaclaray.

(3) By removing the synchronizing gear and changing the arrangement of the synchronizing shaft, it is possible to secure a large front space on the cassette insertion side of the cassette loading device, increased design freedom, and space for printed wiring boards. It can contribute to making the equipment more compact.・

[Brief explanation of the drawing]

Original Figure 1 is an external view of the cassette loading device of the present invention, and Figures 2-
FIG. 4 shows a cross-sectional view of the main parts of the cassette mounting M device of the present invention.
FIG. 4 is a diagram showing a state in which the cassette is properly installed. Explanation of symbols 1... Cassette 2... Right side plate 5... Left side plate 4... Support frame 6... Synchronous shaft body
8...Right drive gear 12...Cassette holder 1
3...Right rotation arm 14...Left rotation arm 16...
・Chassis representative patent attorney Katsuo Ogawa';<-,:
2nd 3rd Kasumi 4th Figure

Claims (2)

[Claims] (1) In a cassette mounting device of a magnetic recording and reproducing device that moves a cassette holder that holds and transports a tape cassette forward and backward from a cassette ejection position to a normal mounting position, the cassette holders are driven on both sides of the cassette holder. A rotating arm member is arranged, and a synchronizing shaft body for rotationally synchronizing the rotating arm members is coupled to the rotational center of the rotating arm members on both sides, thereby connecting the rotating arm members on both sides. cassette loading device. (2) The cassette according to claim 1, wherein the synchronizing shaft body is located in a space between a tape cassette normal mounting height regulating surface and a chassis board on which a cassette mounting device is mounted and fixed. Mounting device.